Example: Home area: 1,800 sq ft · Climate: Moderate → AC size: 4 tons.
Capacity: 48,000 BTU/hr
Rule used: 1 ton per 500 sq ft
Frequently asked questions
How do I calculate air conditioner size? Enter your numbers above and the result updates instantly. For example: Home area: 1,800 sq ft · Climate: Moderate → AC size: 4 tons.
Is this Air Conditioner Size Calculator free? Yes — completely free with no sign-up or paywall. It runs entirely in your browser and keeps working offline; the numbers you enter never leave your device.
How accurate is it? It uses the standard published formula for air conditioner size. Results are estimates for planning — not financial, tax, medical, engineering, or legal advice.